Derrick



Jan. l2 1926. 1,569,686

` E l.. TIRRELL DERRICK Filed Nov. 16, 1923 3 Sheets-Sheet 1 Jan. 12,1926. 1,569,666

E. L. TIRRELL DERRICK Filed Nov; 16, 1923 3 Sheets-Sheet 2 vx/Emme, V

Jan, 12 1926.

F IE-4.

DERRIGK Filed Nov, 16, 1923 3 Sheets-Sheet 3 yPatented Jan. 12, 1926.

UNITED sanftes :ee-.ers

EDWARD, LEO'T'RRELL, OF PHLLIESZBURG,`NEW JERSEY.`

. DERRIQK.

Application filed November 16, 1923. Serial No.'G7`5,0-75.

To all nai/tom it may concern.'

Bc it known that I, EDWARD Lito TIRRELL,

,a citizen 'ofthe'United States, and a resi-y 4dent of Phillipsburo' g,in the county of "Warren and the State of'New Jersey, have made a newkand useful lInvention in Derriclis, of which the following is aspecificavided with a-nieans which vmay. be employed.

tion.

This invention relates to derricks and Vmore j'ai'ticularly to portablederrielrs suoli as are adapted to be mounted on motor .trucks or othertypes ofvehicles.

An object of this invention'isv to provide a derricli of this type whichmay be used for various purposes and which is also proto advantage inerecting such objects as telephone or telegraph poles.

A1fu'rther object is to provide a simple, rugged'derriclr which may bemounted upon the body of a motor truck or any movable vehicle withoutiii-any way interfering with the ordinary use thereof. I'

A still further object is to provide an iinproved association of`derrick and vehicle frame such that movements of the vehicle may beutilized in erecting va telegraph y.pol or like object.

These and other objects, which will bek appar-ent tothose skilledfin-theart, I attain' by means of my invention, one embodiment of which isherein described and illustrated in the accompanying drawings, in whichFigure 1 is a side. elevation of a motor truck equipped with myinvention. Fig. 2 is an end elevation of the apparatus shown in Fig. 1,Fig'. 3 trating a detail of my invention, and Figs. l and 5 are viewsillustrating the operation of apparatus embodying my invention in use inerecting a telegraph pole.

The illustrated embodiment of myv invention includes a frame which isadapted to be rigidly mounted on a vehicle such as a kmotor truck, butwhich is'so arranged that it does not interfere with the normal use ofthe vehicle. A vertically adjustable lifting boom having a rigidlyattached but hori- Zontally swinging arm is jouriialed on the frame insuch relation to a guiding roller that the boom and its associatedlifting devices may be employed in connection with the guiding roller inerecting unwieldy objects such as telegraph poles.

In the illustrated embodiment of the invention l have shown a motortruck generis a view partly in section, illus ally indicated by theVreference letter 'T which inay 'be ofthe usual design except that it isprovided with a rectangular superstructure in the :torni lof a frame 10.Thelfraine includes vertical side members 11 vand a cross top memberlQwhich is' secured ,to the vertical members 11 at the rear of thetruck. rithe frame 10 is preferablyprovided with braces lll extendingforwardly along, the sides ofthe vehicle body, 'as illustrated. Avhollow boom 15 is slidably mounted -in 'brackets 16 and 17 which arerigidly secured` torone of the side members` 11 located at the Vrear ofthe truck.

rlhe hollow boom 15 is providedv with a y series of diainetricallyopposed holeswlS whichl are adapted to` receive supporting* bolts 1.9.3The. bolts 19are vadapted to "contact with theA 'topof the lowerbracketlT and thus rotatablyrsupport the 'booin`15 thereon. By insertingthe'supporting-bolts throughdifferent holes the boom-'15 maybe supportedat different heights. "Obviously a single supporting ybolt" may be usedinsteadl of the two bolts illustrated. It isl desirable. to. provide awear plateQO on the' top of the bracket 17for directly supporting `thebolts 19. `A lift-ingr rope 21,'wliich is l operated, by ya windlass'22, kpasses ,over a pulley '23 mounted lat the'u'pper part ofgthe frame'10, thence downwardly aroundv 'av pulley 24 which is mounted at thelower end of the boom 15. From the pulleyr 24 the rope passes upwardlythrough the hollow booin 15 and over pulleys 25 and 26 which aresupported on ,the horizontally extending arm 27 of -the boom 15. A hook28, secured to the vehicle, is adapted to receive the free end of thelifting' rape 21. It will be yobvious that when thev rope 21 is sosecured rotation of the windlass will operate to raise the boom 15 andthe boom may bemain.

.tained in its adjusted position by inserting the supporting boltsl9tthrough the proper holes.

A grooved roller 29 is mounted in out# y is raised by means of the boom15,*lifting rope 2l and Windlass 22 as shown in Fig. 4l. When in theproper inclined position the vehicle is moved a sufficient distance tocause the upper end of the inclined pole to rest on the roller 29. Thelength of the horizontal arm 27 of the boom is such that movement of thevehicle causes the arm to swing horizontally inward and place the up-'per end of the pole on the roller 29. lVith the outer end of the polesupported by the roller the lifting rope is unfastened from the pole andby moving the vehicle toward the hole provided to receive the pole thelatter rides up on the roller 29 and is erected into a verticalposition, as shown in Fig. 5. It is desirable to provide a stake 32 orsome similar ineens to prevent the bottom of the pole sliding over thehole.

Obviously any desired form of lifting means may be employed for thepurpose of cooperating with the roller 29 in erecting` poles and thelike. The particular features of the above described derrick are claimedin my divisional application, Serial Number 71,918, filed November 2S,1925.

It Will be obvious to those skilled in the art that my invention may notonly be used for the erecting of ,telegraph poles but that it is adaptedto all the uses of a portable derrick and that it may be mounted upon avehicle Without in any way interfering With the normal use thereof.

Having described one embodiment of my invention What claim as new anddesire to secure by Letters Patent is:

l. In combination with a vehicle, a frame mounted at one end thereof, amovable lifting boom mounted on said frame and provided With means forlifting a pole or the like from a prone to an inclined position andmeans mounted on said frame and adapted to engage a pole or the likeheld by said lifting means and to elevate the same on' movement of saidvehicle.

2. ln combination with a vehicle, a f ame mounted at one end thereof andprovided with a horizontal cross-member, a movable lifting boom mountedon said frame and provided with means for lifting a pole or the likefrom a prone to an inclined position and a roller, rotatably mounted onthe crossenember of said frame adapted to engage a pole or the likeheld' by said means and to elevate the same on movement of said vehicle.l

in combination With a vehicle, a frame mounted at one end thereof, alifting means associated with said frame for lifting a pole or the likefrom a prone to an inclined position and means mounted on said frame andadapted to engage a pole or the like held by said lifting means and toelevate the same on movement of said vehicle.

fl. In combination with' a vehicle, a frame mounted at one end thereofand provided with a horizontal cross member, a movable lifting boomassociated with said frame and provided with means for lifting a pole orthe like from a prone to` an inclined position, outwardly extendingbearings on said cross member' and a roller rotatably 1nounted in saidbearings and adapted to engage a pole or the like held by said means andto elevate the same on movement of said vehicle. V

ln testimony whereof, I haveV hereunto subscribed my name this 14th dayof November, 1923,

EDWARD Lno frmnnLL.

